CVE-2026-70219: Microsoft Office Excel Information Disclosure Vulnerability
Microsoft Office Excel Information Disclosure Vulnerability
Other sources
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.17932.21056 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20974 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in https://aka.ms/OfficeSecurityReleases
Event History
Frequently Asked Questions
Which Office deployments should be prioritized for assessment?
Assess systems running Microsoft 365 Apps for Enterprise or Microsoft Office LTSC 2021 or 2024, including both 32-bit and 64-bit LTSC editions listed in the affected software.
What does an attacker need to exploit this issue?
The vector is network-based, requires low attack complexity, and does not require attacker privileges. User interaction is required.
What is the expected impact if exploitation succeeds?
Successful exploitation may disclose information. The provided severity data indicates high confidentiality impact, with no integrity or availability impact.